Add docs building to tox.ini

Author: sfdye

Diff for: docs/conf.py

@@ -13,7 +13,6 @@
 
 from __future__ import absolute_import, print_function
 import sys, os
-from future import __version__
 import sphinx_bootstrap_theme
 
 # If extensions (or modules to document with autodoc) are in another directory,

Diff for: tox.ini

@@ -1,9 +1,17 @@
 [tox]
-envlist = py26,py27,py33,py34,py35,py36,py37
+envlist =
+    py{26,27,33,34,35,36,37},
+    docs
 
 [testenv]
 deps =
     pytest
     unittest2
     py26: importlib
 commands = pytest {posargs}
+
+[testenv:docs]
+deps =
+    sphinx
+    sphinx_bootstrap_theme
+commands = sphinx-build docs build